DEMAGNETISATION OF MAGNETIC COMPONENTS

摘要

An apparatus for demagnetising the magnetic state of a component comprises a coil and means for supplying an AC magnetic field through the coil and means for generating and applying a decaying magnetic field, an exponentially decaying field for example, through the coil. In use of the apparatus, the component is placed within the coil and is controllably demagnetised by application thereto of the decaying magnetic field without need for withdrawal of the component from the coil.